2013 Subaru BRZ Heater Isn't Working

Common Causes of Heater Issues in Your 2013 Subaru BRZ and How to Resolve Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
31% chance it's the
Heater Blower Motor
0%
18% chance it's the
Heater Blower Motor Resistor
0%
51% chance it's
Something else
The most common reasons a 2013 Subaru BRZ heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.
  • Heater Blower Motor: A faulty heater blower motor can result in inadequate airflow or no air circulation in the cabin, affecting the heating system's performance.
  • Heater Blower Motor Resistor: A faulty heater blower motor resistor can cause inconsistent fan speeds or complete failure of the blower motor.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the steps to diagnose why the heater isn't working in a 2013 Subaru BRZ?

To effectively diagnose why the heater isn't working in your 2013 Subaru BRZ, start with a systematic approach that prioritizes simpler checks before delving into more complex issues. Begin by checking the coolant levels, as low coolant can significantly impact the heater's performance. If the coolant is adequate, inspect the thermostat to ensure it is functioning correctly; a stuck thermostat can prevent the engine from reaching the necessary temperature for heating. Next, evaluate the heater core by feeling the hoses for warmth, as a clogged or leaking core can hinder warm air production. Don’t forget to verify the blower motor and resistor, as a malfunction here can stop airflow entirely. Additionally, check the heater control valve to ensure it is allowing coolant flow to the heater core. Look for any leaks in the cooling system, as these can also affect heater performance. A clogged cabin air filter can restrict airflow, so inspect and replace it if necessary. Finally, confirm that the heater settings and controls are functioning properly, as incorrect settings can lead to inadequate heating. By following this diagnostic approach, you can identify and address the issues affecting your heater, ensuring a comfortable driving experience. If problems persist, consider seeking assistance from a professional mechanic.

What are the common problems that could cause the heater to stop working in a 2013 Subaru BRZ?

When troubleshooting the heating system in your 2013 Subaru BRZ, it's essential to understand the common problems that could lead to a malfunctioning heater. One of the primary culprits is a faulty thermostat, which can prevent the engine from reaching the necessary temperature for effective heating. If the thermostat is stuck open, the engine may run cooler, resulting in insufficient heat for the cabin. Additionally, low coolant levels can severely impact the heater's performance, as coolant is vital for transferring heat from the engine to the heater core. Always check the coolant reservoir for adequate levels and inspect for leaks if you notice a drop. Another issue to consider is a clogged heater core, which can hinder heat generation; if the outlet hose feels cooler than the inlet, a flush may be required. In dual-zone systems, malfunctioning blend doors can cause uneven heating, so ensure these components are functioning correctly. Lastly, a broken heater fan can prevent warm air from circulating into the cabin, so verify its operation. By systematically checking these common issues, you can effectively diagnose and potentially resolve the heating problems in your Subaru BRZ.

How urgent is it to address the non-functioning heater in a 2013 Subaru BRZ?

When dealing with a non-functioning heater in your 2013 Subaru BRZ, it's crucial to recognize the urgency of the situation. A malfunctioning heater not only compromises your comfort during colder months but also poses significant safety risks. Without a working heater, your ability to defog and defrost the windshield is severely impaired, which can lead to dangerous driving conditions, especially in cold or humid weather. This lack of visibility can increase the likelihood of accidents, making it imperative to address the issue promptly. Additionally, the underlying causes of a faulty heater, such as a broken blower motor or thermostat issues, can lead to further complications if left unattended. These problems could escalate, potentially causing damage to other components of the heating system or even the engine. Therefore, while it may not seem like an immediate emergency, prioritizing the repair of your heater is essential for ensuring both your safety and driving comfort. Taking action sooner rather than later can prevent more extensive and costly repairs down the line.

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2013 Subaru BRZ Heater Not Working? Troubleshooting Guide